HP 3740 manual Exiting ink-backup mode

HP Deskjet 3740 series printer User's Guide

Installed print cartridge	Result
Black print cartridge.	Colors are printed as grayscale.
Tri-color print cartridge.	Colors print but black is grayed and is not a true black.

Exiting ink-backup mode

Install two print cartridges in the printer to exit the ink-backup mode.

For instructions about installing a print cartridge, see the print cartridge installation page.

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